demjenigen
Demjenigen is a German demonstrative pronoun and determiner used to refer to a person or thing mentioned previously, in the dative case. It is the dative singular form for masculine or neuter antecedents, and it is common in formal or written language.
Demjenigen follows the der/die/dasjenige paradigm. In the singular, masculine: nominative derjenige, genitive dessen, dative demjenigen, accusative
Demjenigen is used to reference the person or thing in a way that emphasizes that specific, already-identified
Demjenigen is more common in formal or literary contexts and is part of the broader set der/die/dasjenige